Since penance brand is a physical spell I decided to build it as a aura stacker abusing conversions and auras. Along with aegis and mageblood the build is very tanky while good at mapping and absolutely insane for bosses

showcase: https://www.youtube.com/watch?v=vlT0DyxUBqY

POB: https://pobb.in/9Zk2dHONu60p

most expensive part of the build is mageblood but otherwise not too bad